Mold



T. A. EDISN AND C. G. KIRCHEB.

MOLD.

APPLacAHoN FxLEn1uLv3.191s.

1,417,463. Patented May 23, 1922.

y heavy substantially flat backing or plate 3 Y rality) formed of steel or other suitable material.

A. or annular clamping member 4 isi secured to each backing plate 3 b a pluf of screws or other suitable astenng mem erst, the ring 4 extending inwardly beyond the matrix 2 and the extending portion thereof being provided' with a lip or flange 6 overlying the peripheral portion of the matrix.Y he backing plates 3 and the corresponding clamping r' s 4 respectively constitute a pair of mold hol ers represented by reference characters A and B. The portionro Veach ring 4 into which the screws extend is prefere. ly provided with an annular flange or projection 7 which fits within 'n correspondingly shaped recess 8 formed in the respective backing plate 3. The portion of each ring 4: which extends above or be-` yond the'coi'responding matrix 2 is preferiibly slivhtly less in thickness than oiiehalf the tliic ss of the records which are desiglned to be formed in the mold.

`he two mold dies and the record blank disposed therebetween are maintained concentric by means of the usual centering pin 9 which extends throu 'h suitable openings provided in the dies an blank at the center thereof, and each of the matrices 2 is sii-itabl secured at its center to the respective baclring plate 3, by means comprising a bushing or sleeve 10 secured in the openings at the center of the backing plate and matrix und throu h which the pin 9 extends.

Each oft-he rings or clamping members 4 is provided with a bevel 11 at its outer edge portion, whereby an annular wedgefehaped groove is formed between the rings of the mold assembly, which enables the mold dies 4to be readily separated by means of wedges or the like and the record removed.

In order to prevent dama ring contact of the molding surfaces of the c ies and the recordblank 1 disposed therebetween, we preferably provide means whereby, iii the absence ofthe molding pressure, the dies of the mold assembly are maintained in a position with the molding surfaces' of the matrices 2 thereof s seed a art a distance in excess of the thic ess o the main body portion ofthe blank 1, as shown in Figure 2. In the tion, this means comprises a plurality of resilient members carried by one of the dies and arranged to dyieldin ly support the other die inthe esire space relation. As shown in the drawing, these resilient members are in the form of leaf springs 12 carried b the clamping ring 4 of the mold holder o tlie lower die. The leaf springs 12 are respectively disposed iii correspondingly Shaped recesses 13 formed in the upper ace of the ring and are respectively secured at one end referred embodiment of our invend to the ring adjacent one end of the respective recesses, as by meansoi pins yor rivets 14, and are free :it their other end. The iir 4termediate portions; of the'springs 12 nor- Ainally bow upwardly `sc asto extend -a oonsiderable distance above the face of the ring 4 to which they are secured. It'will therefore be apparentthat when the up er die isV the position shown with the matrix-2 thereof spaced'from the recordblank 1 When the molding pressure is applied, the mold dies of the -mold assexnbl will be forced toward each other and the eef springs 12' will b e pressed dat :into the recesses 13.

It will be obvious that the springs 12-may be appliedto the upper mold die insteadof to the lower die. It is also to be understood that the construction shown is subject `to numerous. other changes and modifications without departure from the spirit of the in ventionand the scope of the'` appended claims. H

Having now d we claim as' nenr and desire to protect by Leters Patent of the United vStates is as folows:-

1..A mold 'die provided with means disof said die and adapte to coact with a second mold'die when said dies are disposed in propel' co-operative position to maintain the dies in opposed spaced relation, substantially as described. Y

`2. A mold die comprising a matrix and having applied thereto .adjacent the periphery of the matrix resilient means a portion of which normali forwardly of the ace thereof corresponding to the molding surface of the matrix, substantially as described.

3. A mold die for use in molding flat articles and provided with means adapted to coact With'a molding member which is c'o-operative withsaid die in moldin such an article, so as to' maintain such mol `ng member, prior to the application of the molding pressure, in `a ositionwith the moldin face thereof ace from the mcldn face o said ie a ce in excess of the iclmess ossessed by such article prior to the 'mol ing thereof, substantially-as described.

4. A mold diewmprising a mold holder, a Hat sound recordV matrix applied thereto and a, plurality of resilient members applied to the mold holder adjacent the periphery of said matrix and adapted to be e aged by a second die and to yieldingly maintain the said dies with their molding faces s aced apart a distance in excess of the thic ess possessed by the record blank to be moldp ribed our invention, whatextends beyond the dieed prior to the molding thereof, snbstam tially as described.

5. In a` mold die, a mold holder comprising a substantially flat backing member, a. disc-shaped matrix applied to said backing member, and a plurality of spaced resilient members applied to said holder beyond the edge of the matrix, said resilient members having portions normally extending beyond and forwardly of the face of the die, sub stantially as described.

6. In a mold die, a mold holder comprising a substantially flat backing member, a disc-shaped matrix applied to said backing member, and a plurality of spaced leaf springs applied to said holder beyond the edge of the matrix, said leaf springs having portions normally extending beyond and forwardly of the face of the die, substantially as described.

7. In a mold die, a mold holder comprising a substantially fiat backing member, a disc-shaped matrix applied to said backing member, said holder being provided with a plurality of spaced recesses located adjacent and beyond the edge of the matrix, and a plurality of leaf springs, said leaf springs being respectively secured at one end to the mold holder Within said recesses, said leaf springs being free at the other end and having portions normally extending above the mold holder and matrix, and said recesses being adapted to respectively receive said leaf sprin s when the latter are pressed flat, substantia ly as described.

8. In a mold die, a substantially flat baclc ing member, a disc-shaped matrix, a ring securing said matrix at its periphery to said backing member, the upper face of said ring' being provided with a plurality of spaced recesses, and a plurality of leaf springs respectively secured at one end to said ring, Within said recesses and being free at thc other end, said leaf springs having portions normally extending above the ring, substantially as described.

9. In a mold assembly, the combination of a pair of opposed dies having substantially flat matrices and adapted to be forced together to mold a tablet or blank disposed between said matrices, and means tending to yieldingly maintain said dies spaced apart so that said matrices will be separated a distance in excess of the thickness possessed by such tablet or blank prior to the application of the molding pressure, substantially as dcscribed.

10. In a mold assembly, the combination of a pair of dies provided with opposed subn stantially flat matrices and adapted to be forced together to mold a tablet or blank disposed therebetween, and means comprising a plurality of resilient members applied to one of said dies and coacting with the other die so as to yieldingly maintain said matrices spaced apart a distance in excess of thc thickness possessed by such tablet or blank prior to the application of the molding pressure, substantially as described.

1l. In a mold assembly, a pair of dies provided With opposed substantially lat matrices, a substantially Hat article to be molded disposed therebetween, and means tend ing,- to maintain said dies in a position with said matrices spaced apart a distance in cx cess of the thickness possessed by thc main body portion of said article prior to the application of the molding pressure, substantially as described.

12. A mold assembly, comprisinga pair of opposed dies with a substantially liat article to be molded disposed therebetween and provided with. means elfective in the absence of the molding pressure to maintain said dies in a position with the molding faces thereof spaced apart a distance in excess of the thickness of the main body portion possessed by said article prior to the molding thereof, substantially as described.

This specification signed this 25th day of June 1919.

THOS. A. EDISN. CHARLES G. KIRCHER.

Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,417,463, granted May 23, 1922, upon the application of Thomas A. Edimn, of West Orange, and Charles Kircher, of Irvington, New Jersey, for un improvement in Molds, errors appear in the printed specification requiring :fori'eiftion as follows: Page 1, line 86, after the word due inserty the word fo; page lines if? 11ml 88, claim 12, for the words of the mitin body portion possessed by remi possessed by the main body portion of; and that the said Letters Patent ishould he read with these corrections therein that the same may conform to the record of the ease in the Patent Office.

Signed and sealed this 20th day of June.` A. D., 1922.

[SEAL] KARL FENNING,

Acting (f'mlwnssioner of Patents. 

